The Protestant reception both of Aristotle and of the concept of natural law have been the object of renewed attention. The present article aims at a cross-fertilization of these two recoveries: did a specifically Aristotelian approach to natural law (among other important sources) play a significant role in classical Protestant thought? The article answers this question by means of a review of the Protestant commentaries on Aristotle's natural law-passage in Nicomachean Ethics V, 7. Reformation and post-Reformation scholars sometimes offered original readings of this text, but above all they cultivated the various approaches to the passage that had been developed during the medieval period.